EP3788894A1 - Ultrasonic electronic cigarette frequency tracking method - Google Patents

Ultrasonic electronic cigarette frequency tracking method Download PDF

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Publication number
EP3788894A1
EP3788894A1 EP19818998.7A EP19818998A EP3788894A1 EP 3788894 A1 EP3788894 A1 EP 3788894A1 EP 19818998 A EP19818998 A EP 19818998A EP 3788894 A1 EP3788894 A1 EP 3788894A1
Authority
EP
European Patent Office
Prior art keywords
frequency
ultrasonic atomizer
ultrasonic
fimax
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19818998.7A
Other languages
German (de)
French (fr)
Other versions
EP3788894A4 (en
Inventor
Jianfu Liu
Kejun ZHONG
Xiaoyi Guo
Wei Huang
Xinqiang YIN
Jianhua Yi
Zuoxiong ZOU
Yongquan ZHOU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Tobacco Hunan Industrial Co Ltd
Original Assignee
China Tobacco Hunan Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Tobacco Hunan Industrial Co Ltd filed Critical China Tobacco Hunan Industrial Co Ltd
Publication of EP3788894A1 publication Critical patent/EP3788894A1/en
Publication of EP3788894A4 publication Critical patent/EP3788894A4/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/53—Monitoring, e.g. fault detection
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/05—Devices without heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0653—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0653—Details
    • B05B17/0669—Excitation frequencies

Definitions

  • the present invention belongs to the technical field of ultrasonic electronic cigarettes, and particularly relates to a frequency tracking method for an ultrasonic electronic cigarette.
  • the existing frequency tracking methods for ultrasonic electronic cigarettes are to detect the working current of an ultrasonic atomizer and then to find a maximum current in the detection period, and a control module controls the operation of the ultrasonic atomizer with an oscillation frequency of the ultrasonic atomizer corresponding to the maximum current as an optimal frequency.
  • the optimal frequency of the ultrasonic atomizer changes constantly during the working process, the optimal frequency detected may not be the real-time optimal frequency of the ultrasonic atomizer, so that the frequency tracking is inaccurate, and it is difficult to obtain an optimal atomization effect.
  • the optimal frequency obtained during the frequency tracking process is close to the real-time optimal frequency, the amount of smoke of the ultrasonic atomizer is large, otherwise the amount of smoke of the ultrasonic atomizer is small, so the smoke for a user during smoking is unstable, and the user experience is poor.
  • the objective of the present invention is to provide, against the above shortcomings of the prior art, a frequency tracking method for an ultrasonic electronic cigarette, which can achieve accurate frequency tracking, high atomization efficiency, large and stable smoke amount, and good user experience.
  • a frequency tracking method for an ultrasonic electronic cigarette comprising:
  • the above-mentioned frequency tracking process is executed every time the ultrasonic electronic cigarette is activated.
  • the method of the present invention performs continuous and cyclic frequency tracking according to the current detection and the comparison results of current and frequency, so that the working frequency of the ultrasonic atomizer is constantly close to the optimal frequency in real time, accurate frequency tracking is achieved, the atomization efficiency of the ultrasonic atomizer is high, the amount of smoke is large and stable, and the user experience is good.
  • the frequency scan range [fmin, fmax] is [2.3MHZ, 3.2MHZ].
  • the value range of N is 10 to 80.
  • the value range of N is 35 to 45.
  • the value range of ⁇ f is 3 KHZ to 8 KHZ.
  • the value range of ⁇ f is 5 KHZ to 6 KHZ.
  • step B is completed within 1 to 5 ms after start of working of the ultrasonic atomizer.
  • the present invention can achieve accurate frequency tracking of the ultrasonic atomizer, high atomization efficiency, large and stable smoke amount, and good user experience.
  • Fig. 1 is a frequency-current curve chart corresponding to a frequency sweep phase of an ultrasonic atomizer.
  • a frequency tracking method for an ultrasonic electronic cigarette comprises the following steps:
  • the frequency scan range [fmin, fmax] is [2.3MHZ, 3.2MHZ].
  • the value range of N is preferably 10 to 80.
  • the value range of N is more preferably 35 to 45.
  • the value range of ⁇ f is preferably 3 to 8 KHZ.
  • the value range of ⁇ f is more preferably 5 to 6 KHZ.
  • Step B is completed within 1 to 5 ms after start of working of the ultrasonic atomizer.
  • the minimum frequency and the maximum frequency do not necessarily correspond to the minimum current and the maximum current. It can be seen from Fig. 1 that the frequency fimax obtained by frequency sweep is defaulted as a frequency point with better atomization effect.
  • Step D the working current I of the ultrasonic atomizer is detected, and if Imin ⁇ I ⁇ Imax, step C is skipped; otherwise, fimax is updated to original fimax plus ⁇ f, and step E is skipped.
  • Step E if value of the updated fimax is within the frequency scan range [fmin, fmax], step C is skipped; otherwise, step F is skipped.
  • Step F the ultrasonic atomizer is controlled to work at the frequency fimax, and step D is skipped.
  • any one of steps B to F if the ultrasonic atomizer stops working, the frequency tracking process for the ultrasonic electronic cigarette ends.
  • the above-mentioned frequency tracking process is executed every time the ultrasonic electronic cigarette is activated.
  • the present invention executes continuous and cyclic frequency tracking based on the current detection result, the current comparison result and the frequency comparison result. So that the working frequency of the ultrasonic atomizer is constantly close to the optimal frequency in real time, accurate frequency tracking is achieved, the atomization efficiency of the ultrasonic atomizer is high, the amount of smoke is large and stable, and the user experience is good.

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  • Special Spraying Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

A frequency tracking method for an ultrasonic electronic cigarette comprises: A, enabling start of working of an ultrasonic atomizer; B, selecting an oscillation frequency range of the ultrasonic atomizer as a frequency scan range according to the natural frequency characteristics of the ultrasonic atomizer, selecting N frequency points within the frequency scan range, controlling the ultrasonic atomizer to work at the N frequency points, finding out a maximum current value Imax and a minimum current value Imin of the ultrasonic atomizer when working at the N frequency points, and finding out a working frequency fimax corresponding to the maximum current value Imax; C, controlling the ultrasonic atomizer to work at a frequency ftracking = fimax+Δf; D, detecting the working current I of the ultrasonic atomizer, and if ≤ I ≤ Imax, skipping to C; otherwise, updating fimax to original fimax plus Δf, and skipping to E; E, if the updated fimax value is within the frequency scan range, skipping to C; otherwise, skipping to F; and F, controlling the ultrasonic atomizer to work at the frequency fimax, and skipping to D. The method can achieve accurate frequency tracking of the ultrasonic atomizer, high atomization efficiency, large and stable smoke amount, and good user experience.

Description

    Field of the Invention
  • The present invention belongs to the technical field of ultrasonic electronic cigarettes, and particularly relates to a frequency tracking method for an ultrasonic electronic cigarette.
    • Background of the Invention
  • The existing frequency tracking methods for ultrasonic electronic cigarettes are to detect the working current of an ultrasonic atomizer and then to find a maximum current in the detection period, and a control module controls the operation of the ultrasonic atomizer with an oscillation frequency of the ultrasonic atomizer corresponding to the maximum current as an optimal frequency.
  • In practical applications, since the optimal frequency of the ultrasonic atomizer changes constantly during the working process, the optimal frequency detected may not be the real-time optimal frequency of the ultrasonic atomizer, so that the frequency tracking is inaccurate, and it is difficult to obtain an optimal atomization effect. When the optimal frequency obtained during the frequency tracking process is close to the real-time optimal frequency, the amount of smoke of the ultrasonic atomizer is large, otherwise the amount of smoke of the ultrasonic atomizer is small, so the smoke for a user during smoking is unstable, and the user experience is poor.
    • Summary of the Invention
  • In the prior art, as the oscillation frequency of the ultrasonic atomizer corresponding to the maximum current in the detection period is used as the optimal oscillation frequency, the frequency tracking effect is inaccurate and the atomization effect is poor. The objective of the present invention is to provide, against the above shortcomings of the prior art, a frequency tracking method for an ultrasonic electronic cigarette, which can achieve accurate frequency tracking, high atomization efficiency, large and stable smoke amount, and good user experience.
  • In order to solve the above technical problems, the technical solution adopted by the present invention is:
    A frequency tracking method for an ultrasonic electronic cigarette, comprising:
    • step A, enabling start of working of an ultrasonic atomizer;
    • the method further comprising the following steps:
      • step B, selecting an oscillation frequency range of the ultrasonic atomizer as a frequency scan range [fmin, fmax] according to the natural frequency characteristics of the ultrasonic atomizer, selecting N frequency points within the frequency scan range, controlling the ultrasonic atomizer to work respectively at the N frequency points, finding out a maximum current value Imax and a minimum current value Imin of the ultrasonic atomizer when working at the N frequency points, and finding out a working frequency fimax of the ultrasonic atomizer corresponding to the maximum current value Imax;
      • step C, controlling the ultrasonic atomizer to work at a frequency ftracking= fimax+Δf, wherein Δf is a set step value;
      • step D, detecting the working current I of the ultrasonic atomizer, and if Imin≤I≤Imax, skipping to step C; otherwise, updating fimax to original fimax plus Δf, and skipping to step E;
      • step E, if the updated fimax value is within the frequency scan range [fmin, fmax], skipping to step C; otherwise, skipping to step F; and
      • step F, controlling the ultrasonic atomizer to work at the frequency fimax, and skipping to step D;
    wherein in any one of steps B to F, if the ultrasonic atomizer stops working, the frequency tracking process for the ultrasonic electronic cigarette ends.
  • With the above method, the above-mentioned frequency tracking process is executed every time the ultrasonic electronic cigarette is activated. The method of the present invention performs continuous and cyclic frequency tracking according to the current detection and the comparison results of current and frequency, so that the working frequency of the ultrasonic atomizer is constantly close to the optimal frequency in real time, accurate frequency tracking is achieved, the atomization efficiency of the ultrasonic atomizer is high, the amount of smoke is large and stable, and the user experience is good.
  • As a preferred mode, the frequency scan range [fmin, fmax] is [2.3MHZ, 3.2MHZ].
  • As a preferred mode, the value range of N is 10 to 80.
  • As a preferred mode, the value range of N is 35 to 45.
  • As a preferred mode, the value range of Δf is 3 KHZ to 8 KHZ.
  • As a preferred mode, the value range of Δf is 5 KHZ to 6 KHZ.
  • As a preferred mode, step B is completed within 1 to 5 ms after start of working of the ultrasonic atomizer.
  • Compared with the prior art, the present invention can achieve accurate frequency tracking of the ultrasonic atomizer, high atomization efficiency, large and stable smoke amount, and good user experience.
    • Brief Description of the Drawing
  • Fig. 1 is a frequency-current curve chart corresponding to a frequency sweep phase of an ultrasonic atomizer.
    • Detailed Description of Embodiments
  • A frequency tracking method for an ultrasonic electronic cigarette comprises the following steps:
    • Step A, an ultrasonic atomizer starts to work.
    • Step B, an oscillation frequency range of the ultrasonic atomizer is selected as a frequency scan range [fmin, fmax] according to the natural frequency characteristics of the ultrasonic atomizer, N frequency points are selected within the frequency scan range, the ultrasonic atomizer is controlled to work respectively at the N frequency points, a maximum current value Imax and a minimum current value Imin of the ultrasonic atomizer when working at the N frequency points are found out, and a working frequency fimax of the ultrasonic atomizer corresponding to the maximum current value Imax is found out.
  • The frequency scan range [fmin, fmax] is [2.3MHZ, 3.2MHZ].
  • The value range of N is preferably 10 to 80. The value range of N is more preferably 35 to 45.
  • The value range of Δf is preferably 3 to 8 KHZ. The value range of Δf is more preferably 5 to 6 KHZ.
  • Step B is completed within 1 to 5 ms after start of working of the ultrasonic atomizer. As shown in Fig. 1, in a frequency sweep phase of step B, the minimum frequency and the maximum frequency do not necessarily correspond to the minimum current and the maximum current. It can be seen from Fig. 1 that the frequency fimax obtained by frequency sweep is defaulted as a frequency point with better atomization effect.
  • Step C, the ultrasonic atomizer is controlled to work at a frequency ftracking=fimax+Δf, wherein Δf is a set step value.
  • Step D, the working current I of the ultrasonic atomizer is detected, and if Imin≤I≤Imax, step C is skipped; otherwise, fimax is updated to original fimax plus Δf, and step E is skipped.
  • Step E, if value of the updated fimax is within the frequency scan range [fmin, fmax], step C is skipped; otherwise, step F is skipped.
  • Step F, the ultrasonic atomizer is controlled to work at the frequency fimax, and step D is skipped.
  • In any one of steps B to F, if the ultrasonic atomizer stops working, the frequency tracking process for the ultrasonic electronic cigarette ends.
  • The above-mentioned frequency tracking process is executed every time the ultrasonic electronic cigarette is activated. The present invention executes continuous and cyclic frequency tracking based on the current detection result, the current comparison result and the frequency comparison result. So that the working frequency of the ultrasonic atomizer is constantly close to the optimal frequency in real time, accurate frequency tracking is achieved, the atomization efficiency of the ultrasonic atomizer is high, the amount of smoke is large and stable, and the user experience is good.
  • The embodiments of the present invention are described above with reference to the drawings, but the present invention is not limited to the specific embodiments. The specific embodiments described above are merely illustrative but not limited. Many forms may also be made by those of ordinary skill in the art under the enlightenment of the present invention without departing from the purpose of the present invention and the scope of the claims, and all these forms fall into the scope of the present invention.

Claims (7)

  1. A frequency tracking method for an ultrasonic electronic cigarette, comprising:
    step A, enabling start of working of an ultrasonic atomizer;
    the method further comprising the following steps:
    step B, selecting an oscillation frequency range of the ultrasonic atomizer as a frequency scan range [fmin, fmax] according to the natural frequency characteristics of the ultrasonic atomizer, selecting N frequency points within the frequency scan range, controlling the ultrasonic atomizer to work respectively at the N frequency points, finding out a maximum current value Imax and a minimum current value Imin of the ultrasonic atomizer when working at the N frequency points, and finding out a working frequency fimax of the ultrasonic atomizer corresponding to the maximum current value Imax;
    step C, controlling the ultrasonic atomizer to work at a frequency ftracking=fimax+Δf, wherein Δf is a set step value;
    step D, detecting the working current I of the ultrasonic atomizer, and if Imin≤I≤Imax, skipping to step C; otherwise, updating fimax to original fimax plus Δf, and skipping to step E;
    step E, if the updated fimax value is within the frequency scan range [fmin, fmax], skipping to step C; otherwise, skipping to step F; and
    step F, controlling the ultrasonic atomizer to work at the frequency fimax, and skipping to step D;
    wherein in any one of steps B to F, if the ultrasonic atomizer stops working, the frequency tracking process for the ultrasonic electronic cigarette ends.
  2. The frequency tracking method for an ultrasonic electronic cigarette according to claim 1, wherein the frequency scan range [fmin, fmax] is [2.3MHZ, 3.2MHZ].
  3. The frequency tracking method for an ultrasonic electronic cigarette according to claim 1, wherein the value range of N is 10 to 80.
  4. The frequency tracking method for an ultrasonic electronic cigarette according to claim 3, wherein the value range of N is 35 to 45.
  5. The frequency tracking method for an ultrasonic electronic cigarette according to claim 1, wherein the value range of Δf is 3 KHZ to 8 KHZ.
  6. The frequency tracking method for an ultrasonic electronic cigarette according to claim 5, wherein the value range of Δf is 5 KHZ to 6 KHZ.
  7. The frequency tracking method for an ultrasonic electronic cigarette according to claim 1, wherein step B is completed within 1 to 5 ms after start of working of the ultrasonic atomizer.
EP19818998.7A 2018-06-14 2019-06-12 Ultrasonic electronic cigarette frequency tracking method Pending EP3788894A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810612754.0A CN110604339B (en) 2018-06-14 2018-06-14 Ultrasonic electronic cigarette frequency tracking method
PCT/CN2019/090891 WO2019238062A1 (en) 2018-06-14 2019-06-12 Ultrasonic electronic cigarette frequency tracking method

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EP3788894A1 true EP3788894A1 (en) 2021-03-10
EP3788894A4 EP3788894A4 (en) 2022-03-02

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US (1) US11771137B2 (en)
EP (1) EP3788894A4 (en)
JP (1) JP7018545B2 (en)
CN (1) CN110604339B (en)
WO (1) WO2019238062A1 (en)

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WO2019238062A1 (en) 2019-12-19
CN110604339B (en) 2021-12-03
JP2021526389A (en) 2021-10-07
CN110604339A (en) 2019-12-24
EP3788894A4 (en) 2022-03-02
JP7018545B2 (en) 2022-02-10
US11771137B2 (en) 2023-10-03
US20210127749A1 (en) 2021-05-06

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